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Risk factors of neurosensory disturbance following bimaxillary orthognathic surgeryAlolayan, Albraa Badr A. January 2013 (has links)
Objectives: To report the incidence of objective and subjective neurosensory disturbance (NSD) after orthognathic surgery in a major orthognathic centre in Hong Kong, and to investigate the risk factors that contributed to the incidence of NSD after orthognathic surgery.
Materials and Methods: A retrospective cross-sectional study on NSD after orthognathic surgery in a local major orthognathic centre. Patients who had bimaxillary orthognathic surgery reviewed at post-operative 6 months, 12 months or 24 months were recruited to undergo a neurosensory test with subjective and 3 objective assessments. Possible risk factors of NSD including subjects’ age and gender, surgical procedures and surgeons’ experience were analyzed.
Results: 238 patients with 476 sides each of maxillary and mandibular procedures were recruited. The incidences of subjective NSD after maxillary procedures were 16.2%, 13% and 9.8% at post-operative 6 months, 12 months and 24 months, respectively; the incidences of subjective NSD after mandibular procedures were 35.4%, 36.6% and 34.6% at post-operative 6 months, 12 months and 24 months, respectively. Objective neurosensory tests showed general reduced sensitivity in subjects with subjective NSD. Increased age was found to be a significant risk factor of NSD after orthognathic surgery at short term (at 6 months and 12 months) but not at 24 months. SSO has a significantly higher risk of NSD when compared to VSSO. SSO in combination with anterior mandibular surgery has a higher risk of NSD when compared to VSSO in combination with anterior mandibular surgery or anterior mandibular surgery alone. Gender of patients a nd surgeons’ experience were not found to be risk factors of NSD after orthognathic surgery.
Conclusion: The incidence of NSD after maxillary and mandibular orthognathic procedures at post-operative 6 months, 12 months and 24 months was reported. Increased age was identified as a risk factor of short term post-operative NSD but not in long term (24 months or more). Specific mandibular procedures were related to higher incidence of NSD after orthognathic surgery. / published_or_final_version / Dental Surgery / Master / Master of Dental Surgery
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A retrospective cephalometric study of the effect of the Frankel appliance, the ClarkTwin Block and the activator on class II division / by Con Laparidis.Laparidis, Constantinos January 1999 (has links)
Bibliography: leaves 187-211. / 288 leaves : col. ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / An observational retrospective study to determine if any difference exists in the soft tissue profile of Class II division 1 patients before and after treatment with three different functional appliances; the activator with headgear, the Clark Twin Block, and the Frankel. / Thesis (M.D.S.)--University of Adelaide, Dept. of Dentistry, 1999
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A retrospective cephalometric study of the effect of the Frankel appliance, the ClarkTwin Block and the activator on class II division / by Con Laparidis.Laparidis, Constantinos January 1999 (has links)
Bibliography: leaves 187-211. / 288 leaves : col. ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / An observational retrospective study to determine if any difference exists in the soft tissue profile of Class II division 1 patients before and after treatment with three different functional appliances; the activator with headgear, the Clark Twin Block, and the Frankel. / Thesis (M.D.S.)--University of Adelaide, Dept. of Dentistry, 1999
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